be-ytb/js/info.js

const request = async (method, url, data = null, headers = {}) => {
    return new Promise(function (resolve, reject) {
        const xhr = new XMLHttpRequest();
        xhr.open(method, url);

        // 设置请求头
        Object.keys(headers).forEach(function (key) {
            xhr.setRequestHeader(key, headers[key]);
        });

        xhr.onload = function () {
            if (xhr.status >= 200 && xhr.status < 300) {
                resolve(xhr.responseText);
            } else {
                reject(new Error('Request failed with status: ' + xhr.status));
            }
        };

        xhr.onerror = function () {
            reject(new Error('Request failed'));
        };

        xhr.send(data);
    });
}

getVideoDetail = async (url) => {
    const headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Safari/537.36',
    }
    return request('GET', url, null, headers)
        .then(res => {
            let regex = /var ytInitialPlayerResponse\s*=\s*({.*?});/;
            let match = res.match(regex);
            if (!match || !match.length) {
                throw new Error('JSON not found.');
            }
            const ytInitialPlayerResponse = JSON.parse(match[1]);
            console.log(ytInitialPlayerResponse);
            const originVideoDetails = ytInitialPlayerResponse["videoDetails"];
            const thumbnails = []
            for (const item of originVideoDetails["thumbnail"]["thumbnails"]) {
                thumbnails.push({
                    "url": item["url"],
                    "width": item["width"] + "",
                    "height": item["height"] + ""
                })
            }

            const formats = []
            for (const item of ytInitialPlayerResponse["streamingData"]["formats"].concat(ytInitialPlayerResponse["streamingData"]["adaptiveFormats"])) {
                if (item && item["signatureCipher"] && item["mimeType"]) {
                    let urlRegex = /url=([^&]+)/;
                    let match = item["signatureCipher"].match(urlRegex);
                    if (!match) {
                        continue;
                    }
                    const encodedUrl = match[1];
                    const decodedUrl = decodeURIComponent(encodedUrl);

                    formats.push({
                        "width": item["width"] + "",
                        "height": item["height"] + "",
                        "type": item["mimeType"],
                        "quality": item["quality"],
                        "itag": item["itag"],
                        "fps": item["fps"] + "",
                        "bitrate": item["bitrate"] + "",
                        "url": decodedUrl,
                        "ext": "mp4",
                        "vcodec": item["mimeType"],
                        "acodec": item["mimeType"],
                        "vbr": "0",
                        "abr": "0",
                        "container": "mp4_dash"
                    })
                }
            }

            regex = /var ytInitialData\s*=\s*({.*?});/;
            match = res.match(regex);
            if (!match || !match.length) {
                throw new Error('JSON not found.');
            }
            if (!match || !match.length) {
                throw new Error('JSON not found.');
            }
            const ytInitialData = JSON.parse(match[1]);
            console.log(ytInitialData);
            const recommendInfo = [];
            for (const item of ytInitialData["contents"]["twoColumnWatchNextResults"]["secondaryResults"]["secondaryResults"]["results"]) {
                if (item["compactVideoRenderer"]) {
                    const recommendVideo = item["compactVideoRenderer"];
                    recommendInfo.push({
                        "type": "gridVideoRenderer",
                        "videoId": recommendVideo["videoId"],
                        "title": recommendVideo["title"]["simpleText"],
                        "thumbnails": recommendVideo["thumbnail"]["thumbnails"],
                        "channelName": recommendVideo["longBylineText"]["runs"][0]["text"],
                        "publishedTimeText": recommendVideo["publishedTimeText"]["simpleText"],
                        "viewCountText": recommendVideo["viewCountText"]["simpleText"],
                        "shortViewCountText": recommendVideo["shortViewCountText"]["simpleText"],
                        "lengthText": recommendVideo["lengthText"]["simpleText"]
                    })
                }
            }

            const videoDetails = {
                "isLiveContent": originVideoDetails["isLiveContent"],
                "title": originVideoDetails["title"],
                "thumbnails": thumbnails,
                "description": originVideoDetails["shortDescription"],
                "lengthSeconds": originVideoDetails["lengthSeconds"],
                "viewCount": originVideoDetails["viewCount"],
                "keywords": originVideoDetails["keywords"],
                "author": originVideoDetails["author"],
                "channelID": originVideoDetails["channelId"],
                "recommendInfo": recommendInfo,
                "channelURL": `https://www.youtube.com/channel/${originVideoDetails["channelId"]}`,
                "videoId": originVideoDetails["videoId"]
            }
            return {
                "code": 200,
                "msg": "",
                "data": {
                    "videoDetails": videoDetails,
                    "streamingData": {
                        "formats": formats
                    }
                },
                "id": "MusicDetailViewModel_detail_url"
            }
        })
}